Abstract
Single crystals of a new ternary aluminide ErV2Al20 were grown using a self-flux method. The crystal structure was determined by powder X-ray diffraction measurements and Rietveld refinement, and physical properties were studied by means of electrical resistivity, magnetic susceptibility and specific heat measurements. These measurements reveal that ErV2Al20 is a Curie-Weiss paramagnet down to 1.95K with an effective magnetic moment μeff =9.27(1) μB and Curie-Weiss temperature ΘCW =−0.55(4) K. The heat capacity measurements show a broad anomaly at low temperatures that is attributed to the presence of a low-energy Einstein mode with characteristic temperature ΘE =44K, approximately twice as high as in the isostructural ‘Einstein solid’ VAl10.1.
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